Definición y Significado de "a bad penny always turns up"

What is the origin of the proverb "a bad penny always turns up" and when to use it?

The origin of the proverb "a bad penny always turns up" is believed to come from British slang in the 18th century, though it may have earlier roots. While the proverb points out the persistence of negative situations or people, it also serves as a reminder that certain problems or undesirable elements may be difficult to get rid of entirely. It encourages individuals to accept that some things, despite efforts, will inevitably reappear.